Your tablet (Kindle or Galaxy) uses the Android Operating System. Android dropped ALL support of Flash technology last June.

Adobe stopped ALL development of Flash for Android last year. (July 2012) That includes Kindle as well as Samsung Tablets. Additionally, Samsung and Amazon have ended support for Flash in ALL of their newest tablet models.

The following is from Samsung Support (07/31/2013):

"Beginning August 15, 2012 we will use the configuration settings in the Google Play Store to limit continued access to Flash Player updates to only those devices that have Flash Player already installed. Devices that do not have Flash Player already installed are increasingly likely to be incompatible with Flash Player and will no longer be able to install it from the Google Play Store after August 15th, 2012."

And from Kindle Support (07/31/2013):

"The Amazon Silk web browser on Kindle Fire 1st Generation supports some, but not all, versions of Flash. Adobe Flash is pre-installed on a 1st Generation Kindle Fire and is disabled by default.

If you see a message to install Flash while using your Kindle Fire, this means that the content you're attempting to view uses Flash. If you want to view the content, you'll need to enable Flash through the Silk settings menu.

If a web page suffers from slow performance due to Flash, or you're unable to view a web page with Flash enabled, we recommend switching to mobile view when browsing a Flash-heavy website to see if that solves your problem:

Some popular websites may also have an app available. Check Amazon Appstore, accessible through the Apps library on your Kindle Fire, for availability.